Ions‐Migration‐Mediated Structural Stabilization in NiFe (Oxy)Hydroxides for Durable Alkaline Water Electrolysis

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 16, 2025

Abstract Elevating iron‐involved sites in NiFe (oxy)hydroxides significantly accelerates oxygen evolution reaction (OER) kinetics but often sacrifices stability due to extensive metal ablation during industrial electrolysis. Here, an ions migration‐induced stabilization strategy is introduced explore robust catalysts for OER. The present approach involving cathodic polarization of Fe‐rich NiFe‐layered double hydroxides (LDH) facilitates selective substitution Ni with Fe cations and deep oxyanions OH ‐ , leading decreased layer thickness, enriched sites, aggravated lattice distortion reorganized NiFe‐LDH (R‐NiFe‐LDH). Correspondingly, R‐NiFe‐LDH fully transforms into γ‐(NiFe)OOH retained nanosheet morphology, reduced distortions, dramatically inhibited dissolution prolonged It achieves exceptional durability at 500 mA cm −2 retaining ≈90% over 5 days, substantially outperforming pristine (50% loss). Over 2 months, delivers only a 70 mV overpotential increase, whereas decays by 140 just 75 h. An anion exchange membrane water electrolyzer applying as both electrodes exhibit zero decay 1000 100 h, compared rate 3.6 h −1 the counterpart. This work showcases straightforward engineering atomic arrangements toward

Язык: Английский

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Synergistic Pd-CoFe sites for efficient and selective electrooxidation of glycerol to glyceric acid coupled with H2 evolution

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163056 - 163056

Опубликована: Апрель 1, 2025

Язык: Английский

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Accelerated activation of lattice oxygen for CO Oxidation: Promoting the role of oxygen vacancies

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 163358 - 163358

Опубликована: Апрель 1, 2025

Язык: Английский

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The ion effect on electrocatalytic oxidation reactions

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(47), С. 32548 - 32565

Опубликована: Янв. 1, 2024

The ion effect on anodic reactions manifests three major forms: (1) regulate the adsorption energy through non-covalent interactions, (2) mass transfer behavior, and (3) interfacial pH by controlling proton transfer.

Язык: Английский

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Preparation of CuCo2O4@NFs nanoflower material with abundant VO/VCo: An excellent catalyst for oxidative breakage of the β-O-4 bond of lignin

Applied Catalysis A General, Год журнала: 2024, Номер unknown, С. 119983 - 119983

Опубликована: Окт. 1, 2024

Язык: Английский

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